Статья

Self‐Induced Bi‐interfacial Modification via Fluoropyridinic Acid For High‐Performance Inverted Perovskite Solar Cells

Kunpeng LiFaculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 P. R. ChinaYong ZhuFaculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 P. R. ChinaXiong ChangFaculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 P. R. ChinaMengni ZhouFaculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 P. R. ChinaXixi YuFaculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 P. R. ChinaXinlong ZhaoFaculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 P. R. ChinaTao WangFaculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 P. R. ChinaZhongming CaiFaculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 P. R. ChinaXing ZhuFaculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 P. R. ChinaHua WangFaculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 P. R. ChinaJiangzhao ChenFaculty of Materials Science and Engineering Kunming University of Science and Technology Kunming 650093 P. R. ChinaTao ZhuFaculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 P. R. China

2024en

ABI

Аннотация

Abstract The uncontrolled crystallization of perovskite generates a significant number of internal and interfacial defects, posing a major challenge to the performance of perovskite solar cells (PSCs). In this paper, a novel bi‐interfacial modification strategy utilizing 5‐fluoropyridinic acid (FPA) is proposed to modulate crystal growth and provide defect passivation. It is demonstrated that FPA is self‐deposited at both the top and bottom interfaces of perovskite films during thermal annealing. The CO and N functional groups in FPA serve as chelating agents, binding closely to uncoordinated Pb 2+ /Pb clusters, thereby passivating defects and reducing charge recombination at the interfaces. The strong chemical interactions between FPA and Pb further stabilize the Pb‐I framework, promoting the formation of high‐quality perovskite films, as confirmed by in situ photoluminescence measurements. Consequently, the modified inverted PSCs achieved an exceptional power conversion efficiency (PCE) of 25.37%. Moreover, the devices retained over 93.17% of initial efficiency after 3000 h of continuous illumination under one‐sun equivalent conditions in a nitrogen atmosphere. This paper presents a promising pathway for enhancing the performance and stability of inverted PSCs through a self‐induced bi‐interfacial modification approach.

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Идентификаторы

DOI: 10.1002/aenm.202404335

Цитирования и источники

Цитирований: 4Использованных источников: 0

Показатели — AkademScholar